Chapter 6 Fault Code Information and Maintenance |
Revision July 2008, EG03, SW V1.06 6-3
Fault
Name
Fault Descriptions Corrective Actions
Over-current during
deceleration:
1. Short-circuit at motor
output.
2. Deceleration time too
short.
3. AC drive output capacity
is too small.
1. Check for possible poor insulation at the output
line.
2. Increase the deceleration time.
3. Replace with the AC drive with one that has a
higher output capacity (next HP size).
Over-current during steady
state operation:
1. Short-circuit at motor
output.
2. Sudden increase in motor
loading.
3. AC drive output capacity
is too small.
1. Check for possible poor insulation at the output
line.
2. Check for possible motor stall.
3. Replace with the AC drive with one that has a
higher output capacity (next HP size).
The external terminal EF-
GND goes from OFF to ON.
1. When external terminal EF-GND is closed, the
output will be turned off. (Under N.O. E.F.)
2. Press RESET after fault has been cleared.
Emergency stop.
When the multi-function input
terminals (MI1 to MI4) stop,
AC drive stops any output.
Press RESET after fault has been cleared.
Software protection failure Return to the factory.
Ground fault:
The AC drive output is
abnormal. When the output
terminal is grounded (short
circuit current is 50% more
than the AC drive rated
current), the AC drive power
module may be damaged.
The short circuit protection is
provided for AC drive
protection, not user
protection.
Ground fault:
1. Check whether the IGBT power module is
damaged.
2. Check for possible poor insulation at the output
line.
External Base Block.
AC drive output is turned off.
(Refer to Pr. 08-08)
1. When the external input terminal (B.B) is active,
the AC drive output will be turned off.
2. Disable this connection and the AC drive will
begin to work again.
Low Current
1. Check Load current
2. Check Pr.06-08 to Pr.06-10 setting
Phase Loss Check Power Source Input
